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Finding the Fourth Proportional to 172,296.72, 258,360.84 and 71,075.92

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Solution

The fourth proportional to 172,296.72, 258,360.84 and 71,075.92 is: 106,579.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,296.72 : 258,360.84 = 71,075.92 : x
  2. Step 2: Convert to fraction form
    172,296.72/258,360.84 = 71,075.92/x
  3. Step 3: Cross multiply
    172,296.72x = 258,360.84 × 71,075.92
  4. Step 4: Simplify right side
    172,296.72x = 18,363,234,394.97
  5. Step 5: Solve for x
    x = 18,363,234,394.97/172,296.72
  6. Step 6: Final answer
    x = 106,579.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.